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_C_ License Applicability. Except to the extent portions of this file are
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_C_ made subject to an alternative license as permitted in the SGI Free
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_C_ Software License B, Version 1.1 (the "License"), the contents of this
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_C_ file are subject only to the provisions of the License. You may not use
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_C_ this file except in compliance with the License. You may obtain a copy
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_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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_C_ http://oss.sgi.com/projects/FreeB
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_C_ Note that, as provided in the License, the Software is distributed on an
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_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
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_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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_C_ Copyright in any portions created by third parties is as indicated
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_C_ elsewhere herein. All Rights Reserved.
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_C_ Additional Notice Provisions: The application programming interfaces
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_C_ established by SGI in conjunction with the Original Code are The
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_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
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_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
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_C_ published by SGI, but has not been independently verified as being
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_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
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_C_ The first character in this file must be an '_'!
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_C_ Anything on a line after _C_ is ignored
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_define(_filters,eqn)_C_
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_C_ eqn is automatically replaced with neqn for nroff
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_header(Rotate,multiply the current matrix by a rotation matrix)
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Specifies the angle of rotation, in degrees.
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_phead(_param2 _param3 _param4)
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Specify the \f2x\fP, \f2y\fP, and \f2z\fP coordinates of a vector, respectively.
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_cmnd produces a rotation of _param1 degrees around
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the vector $(_eqnparam2, _eqnparam3, _eqnparam4)$.
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The current matrix (see _cmnd(MatrixMode)) is multiplied by a rotation
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matrix with the product
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replacing the current matrix, as if _cmnd(MultMatrix) were called
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with the following matrix as its argument:
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left ( ~ down 20 matrix {
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_eqnparam2 sup 2 (1 ^-^ c)~+~ c above
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_eqnparam3 _eqnparam2 (1 ^-^ c)~+~ _eqnparam4 s above
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_eqnparam2 _eqnparam4 (1 ^-^ c)~-~_eqnparam3 s above
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~~ _eqnparam2 _eqnparam3 (1 ^-^ c)~-~_eqnparam4 s above
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~~ _eqnparam3 sup 2 (1 ^-^ c)~+~ c above
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~~ _eqnparam3 _eqnparam4 (1 ^-^ c)~+~ _eqnparam2 s above
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~~ _eqnparam2 _eqnparam4 (1 ^-^ c)~+~ _eqnparam3 s above
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~~ _eqnparam3 _eqnparam4 (1 ^-^ c)~-~ _eqnparam2 s above
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~~ _eqnparam4 sup 2 (1 ^-^ c) ~+~ c above
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ccol { ~0 above ~0 above ~0 above ~1}
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Where $c ~=~ cos (_eqnparam1)$, $s ~=~ sin (_eqnparam1)$, and
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$||(~_eqnparam2, _eqnparam3, _eqnparam4~)|| ~=~ 1$ (if not, the GL
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will normalize this vector).
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If the matrix mode is either _const(MODELVIEW) or _const(PROJECTION),
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all objects drawn after _cmnd is called are rotated.
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Use _cmnd(PushMatrix) and _cmnd(PopMatrix) to save and restore
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the unrotated coordinate system.
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This rotation follows the right-hand rule, so
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if the vector $(_eqnparam2, _eqnparam3, _eqnparam4)$ points toward the
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user, the rotation will be counterclockwise.
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_const(INVALID_OPERATION) is generated if _cmnd
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is executed between the execution of _cmnd(Begin)
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and the corresponding execution of _cmnd(End).
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_cmnd(Get) with argument _const(MATRIX_MODE)
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_cmnd(Get) with argument _const(COLOR_MATRIX)
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_cmnd(Get) with argument _const(MODELVIEW_MATRIX)
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_cmnd(Get) with argument _const(PROJECTION_MATRIX)
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_cmnd(Get) with argument _const(TEXTURE_MATRIX)